Take high quality homemade or import PAN (Polypropylene Nitrile) protonema (milk-white) Oxygenation disposes it into black bright long silk by the new type of beforehand oxygenation stove.

• 采用优质国产或进口PAN（聚丙烯腈）原丝（乳白色）通过新型预氧化炉，氧化处理而成黑色光亮长丝。